Roof drain



April 23, 1929; T. J. FLYNN ET Al.y 1,710,304

ROOF DRAIN Filed Deo. 5, 1925 leal-ias an, as, i929. Y i i i y 14,7105304'1 UNiTED s'rarifis'--ieii'risur OFFICE,

'ritannnns J. iiiirnii erin J'Onir H. FLYnN, Oii GAMBnineai, MAssAcHUsnTTs ROOF DRAIN.

Appiieuon ined December a i925,` serial No. 73,446.'

This invention relates to improvements in likewise to provide against any of the gravel root drains and has as its general object to or other rooling material entering the drain, provide a durableand substantial root drain the sheet et which the drain is formed is which may be installed in practically any pressed to provide an upstanding 'bead 5 y60 typ-e oi' root construction and connected. or which is continuous and' centrally located any type et rooting. with respect to the margin of the pan and ,-.uer objet-t et the invention is to prospaced from and surrounds the opening' 2 in 'oogt drain which will'be so constructed the pan. T his bead is preferably of a gradun eilcctually Licrtoriii its tunction in V:illy curved contour in cross scetion so that-'65 'ai mg the 'water 'trein the root and conit may spread under expansion or contract duet the same without leakage,'to the down `with the construction of the roof, and the said pipe l ib, or o r it'ting. bead is of sutlicient height to provide against y ier object ot the invention is to proany ot' the gravel or other rooting material,

'n so constructed as to pi'o-y which covers the upper surface ot the pan out- 70 i5 vide against the condensation ot moisture on wardly beyond the bead, and which is indithe e:-;tci'iorot the shell thereel. cated by thereterence letter R', reaching that ifilnothi'lr object olii the invention is to so portion ot the pan which is surrounded by eanstruct the root han that expansion and the bead. Therefore, the bead defines orsurconti-tation, duc to se jing vor shrinkage oit rounds an area of the pan which is smooth 75 o0 the root structure, will be compensated 'tor so :and not covered by the roofing material and @it lilicliliood of leakage is reduced to a over which the rain water may readily HOW vide a root d minimum. Y c withouty any obstruction being offered to its im @Uma-H5111@ drawings ;V passage 'trom the pan into the drain proper. Figure l is a perspective view o'li the root Likewise, inasmuchfas none of the gravel or 80 drain embodying the invention. f other rooting materialA can reach this portion i2 is a detail vertical sectional view o'tthe pan,` there is no likelihood of the rootthe root drain installed, the section ing material entering the shell o'f-the drain. ken sulraantially 'on the'line 2-2 rlhe sliellcomprises an outer shellmeinber or ure l, lo king in the direction indiwhich is preferably ot seamless copper tubingl 85 U0 cated by the a'uoif's. c and eXteriorly of a diaineter'to tit relatively Figure 3 is a fragmentary perspective view. snugly throughv tlieopening2 in the pan, the illustrating a portion ot the strainer cap ot said shell section being provided at its upper the drainer. endwith a circumscribing outstanding lan'ge The root drain comprises a unitary struc- 7 which rests upon the upper side of the por- `90 ture which is'illustratcd in Figure l of the tion ol the pan of the drain which is surdrawiiigs and which includes appan indicated rounded by the bead The shell 'section-6 in general by the numeral. l, and which extends downwardly through the opening 3 preferably made et sott sheet copper land' and is flared at its lower end asindicatedby pressed in one piece. This pan may be ot the the numerall, so as to lit withiirthe socket 95 rectangular torni shown in Figure 1,. or ot or bell 9 ot a hub coupling 10 which maybe any other desired torni, and the saine is proof tliestraight or elbow type,as found. eXn vided centrally with an. opening indicated by pedient. ln order to provide a watertight the numeral 2'; in which the outer shell of the union between the shell section 6 and the hub drain, to be lpresently described, is iitted. 10,a packing 110i oakum is tamped into the 100 'llhe pan is to be disposed upon the siirtace of space between the wall of the socket 9 of the the root, indicated by the reference letter R, hub and the lower end'portion ot the shell secwith the opening 2 in. approximate registration 6 which tits within the socket, and a calktion with the epening which is provided in ing of lead, indicated by the numeral 12, is the root or root deck. te accommodate-the poured into the socket and completes the seal 105 drain, and the pan is secured in any suitable between the parts, it being observed that the manner, as for example, by nails 4t which are rim ot the flanged lower end of the shell secdriven through the pim fulfil HO the deck 0f tion 6 seats snugly against the inner surface the root As previously stated, the drain is of the vsaid socket substantially at the shouldes `ned yto be emp any type ot root and 'for the purpose or com-` pensating iter expansion and contraction and innersection which is indicated by the numeral 14 and is likewise olseamless copper tubloyed in connection with der 13 thereof. The shell further includes an 110 ing but of a lighter gauge than the section 6. The section 14 comprises the inner section of the shell and the same is exteriorly oi al ldiameter somewhat less than the internal diameter of the section 6 of the shell7 the exterior diameter of the shell section 14, however, being substantially equ al to the internal diameter of the hub 10 below the socket thereof, so that the lower end of the shell section 14 is adapted( to fit snugly within the said hub. At its upper end, the shell section 141 is formed with an outstanding circuinseribing flange 15 which rests flat upon the upper side oi? the flange 7 oit the outer shell section G,

rlhe numeral 1G indicates in general the .strainer cap of the drain and this cap is oit domelike form and is provided in its top with openings 17 and in its sides with openings 18 for the passage of rain water and the entrance oi' air AVto provide for freerilow of the water into the drain, the lower edge of the cap being` provided with notches 19 through which the rain water may flow from the pan 1 The said lower edge or base oit the cap 1G is disposed to rest against the outstanding flange of the shell section 11i, and the strainer cap'is provided exterior-ly at intervals in the circumference of its bottom portion with lugs 20 which are notched as indicated by the numeral 21, so as to accommod ate brass bolts 22 which are threaded through outstanding lugs or ears -23 upon the flange l" and into threaded openings 211- `formed in the pan 1 adjacent the opening 2 therein, the several eom ponent parts oif the drain being, in this inanner, connected together to constitute a uni lary structure.

It will be evident that inasmuch the section 14 of the shell oit the drain is of less diameter than the outer section Gu a. dead air space 221 will be provided between the sections` thus insulating the sectionsso that there will be no likelihood of the formation ol water oi. condensation, upon the sui-race ofthe section 6 which might otherwise occur, due to the presence of warm7 moist air within the building in whichthe drain is installed.V Furthermore, the section 6 establishes a` lirm and rigid connection between the drain as a whole and the hub titting 10, and the section 14 is, therefore, relieved of strain and is better adaptedto serve its primary junction of conducting the rain water to the hub 10.

It will likewise be evident from the toregoing` description of the invention that the parts comprising the drain will not'be subjected to stresses or strains due to expansion or contraction oi. the roof structure, because of the provision of the expansible and contracti'ble bead 5, which bead, as previously explained, likewise serves as an abutment or stop to prevent any of the reaching the strainer cap 16.

Having thus described the invention, what we claim is:

In a structure of the character described a drain pipe havin g its upper end portion enlarged to provide a socket open at its upper end, a roof drain comprising inner and outer tubes, the outer tube having its upper end adapted to be secured to a roof and its lower end portion extending into. said socket in spaced relation to the walls thereof and pro-` vided with an outstanding annular iiange bearing against the walls of 'the socket, the inner tube being spaced from the walls outer tube and having its upper` and in airti g'ht engagement therewith and its lower end portion projecting downwardly and li'tting snugly within the drain pipe beneath the socket to ttorm a dead-air space between the tubes, and packing` in the socket about the outer tube to firmly hold the same'in place.

In testimony whereof we affix our-.signaH tures. 7

rnilnnnus J. miran;

roo iin g in atei-i al oi the 

